1 files changed, 9 insertions, 0 deletions
diff --git a/block/elevator.c b/block/elevator.c
index 5437059c9261..0b1db9afb586 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -831,3 +831,12 @@ struct request *elv_rb_latter_request(struct request_queue *q,
 	return NULL;
 }
 EXPORT_SYMBOL(elv_rb_latter_request);
+
+static int __init elevator_setup(char *str)
+{
+	pr_warn("Kernel parameter elevator= does not have any effect anymore.\n"
+		"Please use sysfs to set IO scheduler for individual devices.\n");
+	return 1;
+}
+
+__setup("elevator=", elevator_setup);